# vDiffraction vs Another Turing Machine Lite

The clearest difference is in-app purchases: vDiffraction at none against Another Turing Machine Lite's 5. vDiffraction also leads on ads (none vs shown) and iOS requirement (8.0 vs 18.2). On price and device support there is nothing between them.

Both are free to download. Another Turing Machine Lite sells 5 one-off in-app purchases. vDiffraction asks for nothing beyond the download.

## The numbers

| Metric | vDiffraction | Another Turing Machine Lite |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 2 days |
| Size | 32 MB | 4 MB |
| Requires iOS | **8.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Institut Laue-Langevin](https://appshunter.io/developer/649939789) | [Stefan JOSTEN](https://appshunter.io/developer/949662361) |

## What reviewers say

### vDiffraction

[App page](https://appshunter.io/ios/app/vdiffraction/id1343287476)

**Features:** macOS Compatibility

**In-app purchases:** none


### Another Turing Machine Lite

[App page](https://appshunter.io/ios/app/another-turing-machine-lite/id6742148023)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Disable Ads | $0.99 | one-time |
| Program Sharing | $0.99 | one-time |
| PDF Report | $0.99 | one-time |
| Buy Me a Coffee | $0.99 | one-time |
| Multiple Tapes | $0.99 | one-time |


## Frequently asked questions

### Is vDiffraction free?

vDiffraction is free to download, with no in-app purchases.

### Is Another Turing Machine Lite free?

Another Turing Machine Lite is free to download, with in-app purchases available.

### Do vDiffraction or Another Turing Machine Lite have ads?

Another Turing Machine Lite shows ads; vDiffraction does not.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*